Exposes a shlib interface for media/audio path.

chromecast/browser/cast_content_browser_client.cc

Index: chromecast/browser/cast_content_browser_client.cc
diff --git a/chromecast/browser/cast_content_browser_client.cc b/chromecast/browser/cast_content_browser_client.cc
index 3d61b0105c05a155a9c68098b6e8730a6fc7f18b..84438ca87ffaea16a398acbbda4a7fdde6c6ffa2 100644
--- a/chromecast/browser/cast_content_browser_client.cc
+++ b/chromecast/browser/cast_content_browser_client.cc
@@ -23,6 +23,7 @@
 #include "chromecast/browser/media/cma_message_filter_host.h"
 #include "chromecast/browser/url_request_context_factory.h"
 #include "chromecast/common/global_descriptors.h"
+#include "chromecast/media/audio/cast_audio_manager_factory.h"
 #include "chromecast/media/cma/backend/media_pipeline_device.h"
 #include "chromecast/media/cma/backend/media_pipeline_device_factory.h"
 #include "components/crash/app/breakpad_linux.h"
@@ -38,7 +39,6 @@
 #include "content/public/common/content_switches.h"
 #include "content/public/common/url_constants.h"
 #include "content/public/common/web_preferences.h"
-#include "media/audio/audio_manager_factory.h"
 #include "net/ssl/ssl_cert_request_info.h"
 #include "net/url_request/url_request_context_getter.h"
 #include "ui/gl/gl_switches.h"
@@ -71,13 +71,6 @@ CastContentBrowserClient::GetBrowserMessageFilters() {
   return std::vector<scoped_refptr<content::BrowserMessageFilter>>();
 }
 
-scoped_ptr<::media::AudioManagerFactory>
-CastContentBrowserClient::CreateAudioManagerFactory() {
-  // Return nullptr. The factory will not be set, and the statically linked
-  // implementation of AudioManager will be used.
-  return scoped_ptr<::media::AudioManagerFactory>();
-}
-
 #if !defined(OS_ANDROID)
 scoped_ptr<media::MediaPipelineDevice>
 CastContentBrowserClient::CreateMediaPipelineDevice(
@@ -90,9 +83,10 @@ CastContentBrowserClient::CreateMediaPipelineDevice(
 
 content::BrowserMainParts* CastContentBrowserClient::CreateBrowserMainParts(
     const content::MainFunctionParams& parameters) {
-  return new CastBrowserMainParts(parameters,
-                                  url_request_context_factory_.get(),
-                                  CreateAudioManagerFactory());
+  return new CastBrowserMainParts(
+      parameters,
+      url_request_context_factory_.get(),
+      make_scoped_ptr(new chromecast::media::CastAudioManagerFactory()));
 }
 
 void CastContentBrowserClient::RenderProcessWillLaunch(